Siemens SENTRON 7KT1681 Manual page 12

Safety instructions
2.1 Safety instructions
NOTICE
Device damage due to condensation
Humidity may cause condensation on the device if temperature balance has not been
reached. Condensation may damage the device when it is connected to the power supply.
Do not connect the device to the power supply until temperature balance has been
reached. To achieve temperature balance, place the device in the operating room for a
period of at least two hours.
Note
RS 485 termination recommended
In order to avoid reflection on the bus cable, we recommend fitting a 120 Ω terminating
resistor at the beginning and end of the bus cable.
To establish Modbus RTU communication, the communication parameters must be known.
These include baud rate and format. Furthermore, you must have entered the slave address
in the device.
Note
Risk of manipulation!
In order to reduce the risk of manipulation occurring on the device, it is recommended that
the protective mechanisms available in the device are activated.
Default passwords for the protective mechanisms:
• Use 1000 for user rights without write access.
• Use 2000 for extended rights with write access.
Use a lead seal on the cover for security.
Safety-related symbols on the device
10
Symbol Meaning
Risk of electric shock
Electrical installation demands technical competence
7KT multimeter
Manual, 08/2018, 2514284149-01